Table 3. Quality assessment of RCTs.

RCTs: randomized controlled trials

Siebert et al. [10]; Asif et al. [11]; Tyler et al. [12]; Alqahtani et al. [13];  Moraa et al. [14]; Fernandes et al. [15]; Gates et al. [16]; Garbutt et al. [19]

Studies	Random sequence generation (selection bias)	Allocation concealment (selection bias)	Blinding of participants	Blinding of personnel/care providers (performance bias)	Blinding of outcome assessor (detection bias)	Incomplete outcome data (attrition bias)	Selective reporting (reporting bias)	Other biases	Overall
Siebert et al. [10]	+	+	+	+	+	+	+	-	7/8
Asif et al. [11]	+	+	+	+	+	+	+	-	7/8
Tyler et al. [12]	+	+	+	+	+	+	+	-	7/8
Alqahtani et al. [13]	+	+	+	+	+	+	+	-	7/8
Moraa et al. [14]	+	+	+	+	+	+	+	-	7/8
Fernandes et al. [15]	+	+	+	+	?	+	+	-	6/8
Gates et al. [16]	+	+	+	+	+	+	+	-	7/8
Garbutt et al. [19]	+	+	+	+	+	+	+	-	7/8